QML Treeview generate warning from Javascript in QtCreator console

When running Qt Quick Controls 1 - File System Browser Example from QtCreator

The following warning is displayed in the QtCreator console.

This seems to be related to use of TableViewColumn

"Could not convert argument 2 at"

"expression for index@file:///D:/TOOLS/Qt/5.12.2/msvc2017_64/qml/QtQuick/Controls/Private/TreeViewItemDelegateLoader.qml:84"

"expression for onItemAdded@file:///D:/TOOLS/Qt/5.12.2/msvc2017_64/qml/QtQuick/Controls/Private/BasicTableView.qml:617"

"expression for onCompleted@file:///D:/TOOLS/Qt/5.12.2/msvc2017_64/qml/QtQuick/Controls/Private/BasicTableView.qml:546"

"Passing incompatible arguments to C++ functions from JavaScript is dangerous and deprecated."

"This will throw a JavaScript TypeError in future releases of Qt!"

Model size of -15 is less than 0

Model size of -17 is less than 0